https://devzone.nordicsemi.com/f/nordic-q-a/60178/problem-setting-flags-for-bluetooth-advertisements-on-nrf52840-devicesFirst let me say, the nRF52840 is an awesome chip... I am trying to implement the Google/Apple bluetooth protocol ( https://covid19-static.cdn-apple.com/applications/covid19/current/static/contact-tracing/pdf/ContactTracing-BluetoothSpecificationv1.1en-USTelligent Community 13Wed, 15 Apr 2020 14:46:57 GMThttps://devzone.nordicsemi.com/thread/244777?ContentTypeID=1Wed, 15 Apr 2020 14:46:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a9fbbd11-bada-4dba-ac08-5ad83a7a0d17SaeWoo Nam<p>Ahh... Great, thanks for pointing out my misinterpretation of the specification....And, thanks for the very quick response. &nbsp;&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/244760?ContentTypeID=1Wed, 15 Apr 2020 13:57:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:75541817-7886-4fcc-a916-dc154dae9af3Hung Bui<p>Hei Sae Woo,&nbsp;</p> <p>Flag 0x1A means&nbsp;BLE_GAP_ADV_FLAG_LE_BR_EDR_HOST | BLE_GAP_ADV_FLAG_LE_BR_EDR_CONTROLLER | BLE_GAP_ADV_FLAG_LE_GENERAL_DISC_MODE<br />This is not the case with our chip, we don&#39;t support BR_EDR so it&#39;s obvious that the softdevice wouldn&#39;t accept that flag.&nbsp;<br />If you read the pdf file you provided, you don&#39;t need to set the flag to 0x1A. The only requirement for the flag is bit 1 equal 1. (Flags Section: LE general discoverable mode (bit 1) shall be set to 1). Meaning you can use either&nbsp;&nbsp;BLE_GAP_ADV_FLAG_LE_GENERAL_DISC_MODE or&nbsp;BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE.&nbsp;<br /><br /></p><div style="clear:both;"></div>